Does anybody know if their are any internal diffrences between a single cam obd o and obd 1 distributers?? I was just wondering if i could just use an obd-0 plug on a obd1 distributer in my 90' hatch??

 

What ecu are you using? If you are just using the plug (to make plugging in the distributor easier), then you should be OK as long as the ecu and distributor are compatible. Internally, there is a difference between an OBD0 and OBD1 distributor.

 

I am using an 90 si computer.. What are the diffrences?

If i used a obd0 to obd1 conversion adapter could i just use a gray plug distributer and a p28??

 

An OBD1 distributor will not work with an OBD0 ecu. The difference is in one of the sensors inside the distributor itself. If you use a jumper harness and a P28, you'll be all good.